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Title: The role of polarity in nonplanar semiconductor nanostructures
Authors: de la Mata, María
Zamani, Reza R.
Martí-Sánchez, Sara
Eickhoff, Martin
Xiong, Qihua
Fontcuberta i Morral, Anna
Caroff, Philippe
Arbiol, Jordi
Keywords: Science::Physics
Issue Date: 2019
Source: de la Mata, M., Zamani, R. R., Martí-Sánchez, S., Eickhoff, M., Xiong, Q., Fontcuberta i Morral, A., . . . Arbiol, J. (2019). The role of polarity in nonplanar semiconductor nanostructures. Nano Letters, 19(6), 3396-3408. doi:10.1021/acs.nanolett.9b00459
Journal: Nano Letters 
Abstract: The lack of mirror symmetry in binary semiconductor compounds turns them into polar materials, where two opposite orientations of the same crystallographic direction are possible. Interestingly, their physical properties (e.g., electronic or photonic) and morphological features (e.g., shape, growth direction, and so forth) also strongly depend on the polarity. It has been observed that nanoscale materials tend to grow with a specific polarity, which can eventually be reversed for very specific growth conditions. In addition, polar-directed growth affects the defect density and topology and might induce eventually the formation of undesirable polarity inversion domains in the nanostructure, which in turn will affect the photonic and electronic final device performance. Here, we present a review on the polarity-driven growth mechanism at the nanoscale, combining our latest investigation with an overview of the available literature highlighting suitable future possibilities of polarity engineering of semiconductor nanostructures. The present study has been extended over a wide range of semiconductor compounds, covering the most commonly synthesized III-V (GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb) and II-VI (ZnO, ZnTe, CdS, CdSe, CdTe) nanowires and other free-standing nanostructures (tripods, tetrapods, belts, and membranes). This systematic study allowed us to explore the parameters that may induce polarity-dependent and polarity-driven growth mechanisms, as well as the polarity-related consequences on the physical properties of the nanostructures.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.9b00459
Schools: School of Physical and Mathematical Sciences 
Rights: © 2019 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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